Operating environment Temperature 5-35 ° C, humidity 20-80 % * No condensation Exchange HDD OP-HDWH Series [USB part] Interface USB 3.1 (GEN 1)/3.0/2.0 Number of terminals 1 terminal shape Type-B Bus Power non -support Mounting drive 18TB × 2 drive [Built -in] Interface Serial ATAⅡ Number of terminals 2 ports (HD connection already) Data transfer speed 3.0Gbps (theoretical value) Compatible mode RAID 1, RAID 0, normal mode, spanning * It is set to RAID1 when shipping. Power AC100V 50/60Hz Maximum power consumption 48W Energy consumption efficiency (revised in April 2011) N category 0.00057 External dimensions (width x height x depth) 87 x 127.5 x 205mm * Only the main body (excluding protrusion) Mass about 2.5kg (body only) Green purchase method (revised in April 2011) Response ROHS standard value compliant Main accessories USB 3.0 cable (A to B 1m), AC adapter, instruction manual, warranty